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Study on reducing proportion of potassium nitrate in top-dressing on flue-cured tobacco

机译：在烤烟上染色硝酸钾比例降低硝酸钾比例的研究

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In this paper, flue-cured tobacco cultivar (Nicotiana tabacum Yun 87) was selected to explore whether ammonium phosphor nitrate (APN) alone or associated with potassium sulfate(K_2SO_4) could help reduce the proportion of potassium nitrate(KNO_3) in top-dressing on flue-cured tobacco (FCT). A field experiment was conducted in randomized block design containing three replicates in seven treatments. Results showed, it was the most optimum treatment for improving the economical properties of FCT to apply 148.5kg/ha KNO_3 together with 19.5kg/ha APK at traditional top-dressing time and following 75kg/ha K_2SO_4 after lower leaves harvest. In the meantime, this treatment was also the most optimum way to improve the chemical properties of FCT. Moreover, it enhanced 6.8% of plant height value of FCT over control group and its plant height was higher than that of other treatments. In a word, decreasing the amount of KNO_3 and adding APN plus K_2SO_4 into top-dressing can be more favorable for the physical growth, quality and yield index of FCT than only KNO_3 on FCT and this new fertilizing scheme could both increase income and decrease investment of FCT-growers.
机译：在本文中，选择烤烟品种（烟草塔巴突云87），探索单独的硝酸铵（APN）或与硫酸钾（K_2SO_4）相关的氨磷（K_2SO_4）可以有助于减少硝酸钾（KNO_3）在敷料中的比例在烤烟（FCT）上。在含有三种处理中的三种重复的随机嵌段设计中进行了田间实验。结果显示，改善FCT经济性能的最佳处理，以便在传统的顶级敷料时间和下降叶收获后的75kg / ha k_2so_4之后涂在19.5kg / ha apk。与此同时，这种处理也是改善FCT化学性质的最佳方法。此外，它增强了对照组FCT的6.8％的植物高度值，其植物高度高于其他治疗。总之，减少KNO_3的量并将APN加k_2so_4加入顶部敷料可以更有利地对FCT上只有kno_3对FCT的物理生长，质量和产量指数更有利，这一新的施肥方案可以增加收入和减少投资FCT-种植者。

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